1 files changed, 14 insertions, 0 deletions
diff --git a/spec/rubyspec/library/fiber/resume_spec.rb b/spec/rubyspec/library/fiber/resume_spec.rb
new file mode 100644
index 0000000000..8709d01142
--- /dev/null
+++ b/spec/rubyspec/library/fiber/resume_spec.rb
@@ -0,0 +1,14 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+with_feature :fiber_library do
+  require 'fiber'
+
+  describe "Fiber#resume" do
+    it "raises a FiberError if the Fiber has transfered control to another Fiber" do
+      fiber1 = Fiber.new { true }
+      fiber2 = Fiber.new { fiber1.transfer; Fiber.yield }
+      fiber2.resume
+      lambda { fiber2.resume }.should raise_error(FiberError)
+    end
+  end
+end